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PREPARATION OF LOW MOLECULAR WEIGHT POLY(GLYCIDYL METHACRYLATE) BY PHOTOpolymerization

Chinese Journal of Polymer Science 2006年第5期24卷 489-496页

作者：杨万泰 State Key Laboratory of Chemical Resource Engineering Beijing 100029 China Department of Polymer Science Beijing University of Chemical Technology Beijing 100029 China

Low molecular weight poly（glycidyl methacrylate）s （PGMAs） were prepared by photopolymerization in ethyl acetate, with benzophenone （BP） as photoinitiator, and triethylamine （TEA） as hydrogen donor. The existence of semipinacol dormant end groups in PGMA was confirmed by FT-IR and ^1H-NMR, and the content of the semipinacol dormant groups was determined quantitatively by ^1H-NMR measurement. The effects of various thctors, such as reaction time, BP concentration and monomer concentration on the synthesis of the polymers were investigated systematically. The molecular weights of the polymers were also investigated with GPC. It is shown that increasing BP concentration and decreasing irradiation time and monomer concentration led to a significant decrease of the molecular weights.

关键词： Poly(glycidyl methacrylate) Photopolymerization solution polymerization Semipinacol dormant groups.

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Synthesis and Characterization of Styrene-Maleic Anhydride-Butyl Acrylate Terpolymer

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Journal of Donghua University(English Edition) 2010年第6期27卷 780-785页

作者：蔡梦军陈建定 National Engineering Research Center of Ultrafine Powder Shanghai Key Laboratory of Advanced Polymeric MaterialsSchool of Materials Science and EngineeringEast China University of Science and Technology

A novel surface modifying agent and internal compatilizer of inorganic and macromolecule composite materials,P(St/MAH/BA)terpolymer,was synthesized in butanone by solution polymerization method using styrene(St),maleic anhydride(MAH),and butyl acrylate(BA)as monomers and azobisisobutyronitrile(AIBN)as an *** affecting factors on terpolymers yields such as polymerization time,reaction temperature,solvent volume,initiator content,and reactants ratios were ***,the structure and thermal properties of terpolymers were primarily characterized and determined by Fourier Transform Infrared Spectroscopy(FTIR),nuclear magnetic resonance(NMR),thermogravimetric analysis(TGA),and gel permeation chromatography(GPC).The results indicate that the terpolymers are random polymers and the yields are low,but the thermal decomposed temperature of terpolymers P(St/MAH/BA)is around 220 ℃ and the average molecular weights(Mw)achieve 1.189×105 g·mol-1.

关键词： solution polymerization styrene(St) maleic anhydride(MAH) butyl acrylate(BA) terpolymer average molecular weights(Mw)

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Potentially Practical Catalytic Systems for Olefin-Polar Monomer Coordination Copolymerization

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CCS Chemistry 2024年第4期6卷 882-897页

作者： Chen Tan Min Chen Chen Zou Changle Chen Institutes of Physical Science and Information Technology Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of EducationKey Laboratory of Environment-Friendly Polymeric Materials of Anhui ProvinceAnhui UniversityHefeiAnhui 230601 CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026

Studies on transition-metal catalyzed olefin-polar monomer coordination copolymerization and their resulting polar-functionalized polyolefin materials have attracted attention from both academia and *** decades of research,recent developments in a variety of high-performance catalytic systems have shown that this field is on the brink of *** review summarizes representative olefin-polar monomer coordination copolymerization catalyst systems that may be suitable for industrial polyolefin production via homogeneous solution-phase processes or heterogeneous gas-phase/slurry-phase processes.

关键词： olefin copolymerization polar monomer catalyst solution polymerization heterogeneous

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Influence of Solvent Conditons on Average Relative Molecular Weight of Polyoctadecyl Acrylate

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Petroleum Science 2005年第1期2卷 90-92页

作者： JiangQingzhe SongZhaozheng KeMing ZhaoMifu StateKeyLaboratoryofHeavyOilProcessing UniversityofPetroleumBeijing102249China Dongxin ShengliPetroleumAdministizativeBureauShandong257001China

polymerization of octodecyl acrylate is studied in four solvents — carbon tetrachloride, chloroform, methylbenzene and tetrachloroethane. Experimental results indicate that the sequence of chain transfer constants in solvents is: carbon tetrachloride>chloroform>methylbenzene>tetrachloroethane in the polymerization of octadecyl acrylate. Influences of four solvents on solubility of polyoctadecyl acrylate prove not the same. In chloroform, polyoctadecyl acrylate shows the highest relative viscosity and the lowest chain termination rate constant. In higher conversion, the average relative molecular weight of polyoctadecyl acrylate depends mainly on the chain transfer constant of the solvent. Under the circumstance of monomer conversion higher than 30%, the viscosity effect induced by polymeric molecular shape in the solvents have a strong influence on the relative molecular weight of the polymer obtained.

关键词： Polyoctadecyl acrylate solution polymerization chain transfer

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